================================================================== BUG: KASAN: use-after-free in list_empty include/linux/list.h:282 [inline] BUG: KASAN: use-after-free in waitqueue_active include/linux/wait.h:128 [inline] BUG: KASAN: use-after-free in wq_has_sleeper include/linux/wait.h:162 [inline] BUG: KASAN: use-after-free in skwq_has_sleeper include/net/sock.h:2141 [inline] BUG: KASAN: use-after-free in sock_def_write_space+0x609/0x630 net/core/sock.c:2911 Read of size 8 at addr ffff88801f847080 by task systemd-udevd/3926 CPU: 0 PID: 3926 Comm: systemd-udevd Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 list_empty include/linux/list.h:282 [inline] waitqueue_active include/linux/wait.h:128 [inline] wq_has_sleeper include/linux/wait.h:162 [inline] skwq_has_sleeper include/net/sock.h:2141 [inline] sock_def_write_space+0x609/0x630 net/core/sock.c:2911 sock_wfree+0x1cc/0x240 net/core/sock.c:2038 skb_release_head_state+0x9f/0x250 net/core/skbuff.c:651 skb_release_all net/core/skbuff.c:662 [inline] _kfree_skb_defer net/core/skbuff.c:874 [inline] napi_consume_skb+0x134/0x390 net/core/skbuff.c:916 free_old_xmit_skbs+0xd5/0x230 drivers/net/virtio_net.c:1389 virtnet_poll_tx+0x1e9/0x370 drivers/net/virtio_net.c:1516 napi_poll net/core/dev.c:6735 [inline] net_rx_action+0x50d/0xfc0 net/core/dev.c:6805 __do_softirq+0x1f8/0xb23 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x235/0x280 kernel/softirq.c:435 common_interrupt+0xa3/0x1f0 arch/x86/kernel/irq.c:239 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:572 RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline] RIP: 0010:check_memory_region+0x55/0x180 mm/kasan/generic.c:192 Code: 86 05 01 00 00 49 83 e9 01 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 <49> 8d 5a 01 48 89 da 48 29 ea 48 83 fa 10 7e 63 41 89 eb 41 83 e3 RSP: 0018:ffffc90005237a00 EFLAGS: 00000282 RAX: ffffed1014ce5246 RBX: 0000000000000036 RCX: ffffffff838935ff RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880a6729230 RBP: ffffed1014ce5246 R08: 0000000000000000 R09: ffff8880a6729237 R10: ffffed1014ce5246 R11: 0000000000000000 R12: ffffc90005237b50 R13: ffff8880a6729200 R14: ffff8880a6729230 R15: 0000000000000036 instrument_atomic_read include/linux/instrumented.h:56 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] tomoyo_check_acl+0x2df/0x450 security/tomoyo/domain.c:184 tomoyo_path_permission security/tomoyo/file.c:586 [inline] tomoyo_path_permission+0x1ff/0x3a0 security/tomoyo/file.c:573 tomoyo_path_perm+0x2f0/0x400 security/tomoyo/file.c:838 security_inode_getattr+0xcf/0x140 security/security.c:1278 vfs_getattr fs/stat.c:121 [inline] vfs_statx+0x170/0x390 fs/stat.c:206 vfs_lstat include/linux/fs.h:3178 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:374 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fec41cf9335 Code: 69 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 31 db 2b 00 f7 d8 64 89 RSP: 002b:00007ffebcd64958 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 000055e781734120 RCX: 00007fec41cf9335 RDX: 00007ffebcd64990 RSI: 00007ffebcd64990 RDI: 000055e781733120 RBP: 00007ffebcd64a50 R08: 00007fec41fb81f8 R09: 0000000000001010 R10: 000055e7817413b0 R11: 0000000000000246 R12: 000055e781733120 R13: 000055e781733140 R14: 000055e781730ddb R15: 000055e781730de0 Allocated by task 19601: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:518 [inline] slab_alloc mm/slab.c:3312 [inline] kmem_cache_alloc+0x13a/0x3f0 mm/slab.c:3482 sock_alloc_inode+0x18/0x1c0 net/socket.c:253 alloc_inode+0x61/0x230 fs/inode.c:232 new_inode_pseudo+0x14/0xe0 fs/inode.c:928 sock_alloc+0x3c/0x260 net/socket.c:573 __sock_create+0xb9/0x780 net/socket.c:1391 sock_create net/socket.c:1478 [inline] __sys_socket+0xef/0x200 net/socket.c:1520 __do_sys_socket net/socket.c:1529 [inline] __se_sys_socket net/socket.c:1527 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1527 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 311: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0xd8/0x120 mm/kasan/common.c:422 __cache_free mm/slab.c:3418 [inline] kmem_cache_free.part.0+0x74/0x1e0 mm/slab.c:3693 i_callback+0x3f/0x70 fs/inode.c:221 rcu_do_batch kernel/rcu/tree.c:2428 [inline] rcu_core+0x5ca/0x1130 kernel/rcu/tree.c:2656 __do_softirq+0x1f8/0xb23 kernel/softirq.c:298 Last call_rcu(): kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_record_aux_stack+0x82/0xb0 mm/kasan/generic.c:346 __call_rcu kernel/rcu/tree.c:2894 [inline] call_rcu+0x15e/0x7c0 kernel/rcu/tree.c:2968 destroy_inode+0x129/0x1b0 fs/inode.c:287 iput_final fs/inode.c:1652 [inline] iput.part.0+0x424/0x850 fs/inode.c:1678 iput+0x58/0x70 fs/inode.c:1668 dentry_unlink_inode+0x2b1/0x3d0 fs/dcache.c:374 __dentry_kill+0x3c0/0x640 fs/dcache.c:579 dentry_kill fs/dcache.c:705 [inline] dput+0x725/0xbc0 fs/dcache.c:878 __fput+0x3ab/0x920 fs/file_table.c:294 task_work_run+0xdd/0x190 kernel/task_work.c:141 get_signal+0xd89/0x1f00 kernel/signal.c:2561 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Second to last call_rcu(): kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_record_aux_stack+0x82/0xb0 mm/kasan/generic.c:346 __call_rcu kernel/rcu/tree.c:2894 [inline] call_rcu+0x15e/0x7c0 kernel/rcu/tree.c:2968 destroy_inode+0x129/0x1b0 fs/inode.c:287 iput_final fs/inode.c:1652 [inline] iput.part.0+0x424/0x850 fs/inode.c:1678 iput+0x58/0x70 fs/inode.c:1668 dentry_unlink_inode+0x2b1/0x3d0 fs/dcache.c:374 __dentry_kill+0x3c0/0x640 fs/dcache.c:579 dentry_kill fs/dcache.c:705 [inline] dput+0x725/0xbc0 fs/dcache.c:878 __fput+0x3ab/0x920 fs/file_table.c:294 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:165 [inline] exit_to_user_mode_prepare+0x1e1/0x200 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88801f847000 which belongs to the cache sock_inode_cache of size 1216 The buggy address is located 128 bytes inside of 1216-byte region [ffff88801f847000, ffff88801f8474c0) The buggy address belongs to the page: page:000000004017f9ca refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801f847ffd pfn:0x1f847 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00006e2188 ffffea0000e41488 ffff8880aa221200 raw: ffff88801f847ffd ffff88801f847000 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801f846f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801f847000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801f847080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801f847100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801f847180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================